
Description: VoiceThread is a cloud-based collaborative multimedia slide show tool. It allows users to upload slides, images, documents, or videos, and then comment on them via webcam video, audio recordings, or text.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Twiddla is an online whiteboarding and collaboration tool that allows multiple people to brainstorm, edit documents, and annotate images in real-time. It has built-in chat and screen sharing for remote teamwork.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API